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At the moment Atmosphere looks good as they have sorted out the 6.2.0 firmware out

PLEASE NOTE: This only helps in backing up your NAND that been updated to v6.2.0 and making changes to it like downgrading, etc., it does NOT help in getting the new special keys needed for CFW on v6.2.0!

But Team-Xecuter SX OS has more options with EmuNAND and game cheats ect

If you go for SX OS you will have to check if your switch is compatible as Nintendo rolled out new switch consoles that block using the CFW